Liquid spraying device



I Feb. 1a, 1958 J. R. MCGEQRGE LIQUID srwrmc nsvxcz Filed July 6, 1954United States Patent 2,823,953 I LIQUID SPRAYING DEVICE John R.McGeorge, Hagerstown, Ind. Application July 6, 1954, Serial No. 441,258

1 Claim. (Cl. 299-90) This invention relates to liquid spraying devicesof the so-called bomb type, in which a liquid is discharged through avalve-controlled duct by means of a compressed gas.

Authorities hold that such spray devices should not be used for mouthsprays and the like, because of the danger of inhaling the propellinggas. Doctors, dentists and others have therefore been deprived of theadvantages which would flow from the bomb type sprayers were it not forthe aforesaid prohibitive factor.

The present invention is designed to improved upon Sprayers of the typeset forth by segregating the liquid from the gas, the segregating meansincluding a movable member acted upon by the gas and active upon theliquid to discharge the latter. The improved device is thus safelyavailable for use in dispensing mouth sprays and the like.

Another object of the invention is to provide the aforesaid movablemember in the form of a flexible bag containing the liquid, said bagbeing enclosed by a shell which contains the compressed gas.

Yet another object of the invention is to provide a somewhat flexibleshell which may be compressed by hand to aid in discharging the liquidwhen the gas pressure has become greatly lowered by repeated use of thedevice.

A liquid discharge tube extends into the flexible liquidcontaining bagand has a liquid-admission orifice, and a further object is to overcomeany possibility of any portion of the bag closing said orifice as saidbag is collapsed more and more with successive use of the device.

Yet another object is to provide a novel construction which allowsrecharging of the device with liquid and gas, thus saving the expense ofpurchasing a new bomb each time one becomes impotent.

With the above and other objects in view that will become apparent asthe nature of the invention is better understood, the same consists inthe novel form, combination and arrangement of parts hereinafter morefully described, shown in the accompanying drawing, and claimed.

In the drawing:

The figure is an enlarged side elevational view partly broken away andshown in section.

The specific construction shown in the drawing may be varied in numerousrespects and is therefore to be considered as illustrative to a largeextent rather than limiting. However, for clarity this construction willbe specifically described.

A head 1 is provided having a valve chamber 2 centrally located in itslower side. This lower side is also formed with a continuous groove 3surrounding and spaced from the valve chamber 2, the outer wall of saidgroove 3 having a screw thread 4. A cup 5 is threaded into the lower endof the chamber 2 and carries a liquidconducting tube 6, and a yieldablevalve seat ring 7 is provided in the upper end of said chamber. Fromthis seat ring 7, an opening 8 extends to a shallow recess 9 in theupper side of the head 1.

A valve 10 in the chamber 2 is seated against the seat 'ice ring 7 by asuitable spring 11 which reacts against the bottom of the cup 5. Thisvalve 10 has an upstanding tubular liquid discharge stem 12 provided atits upper end with a push-button 13 in the recess 9. A discharge nozzle14 is carried by this push-button, in communication with the tubularstem 12, and this stem has liquidconducting orifices 15. When thepush-button 13 is depressed, the valve 10 is opened and a continuousliquiddischarge duct is then alforded from the orifice 16 at the lowerend of the tube 6 to the tip of the nozzle 14.

A flexible bag 17 is employed to contain the liquid 18, and a shell 19is provided to contain the compressed gas which is used to dischargesaid liquid when the valve 10 is opened. The shell 19 is suflicientlyflexible to allow compression thereof by hand to aid in discharging theliquid when the pressure of the compressed gas has become weak fromsuccessive use of the device. The compressed gas in indicated by thevertical dotted lines 20.

The shell 19 has an open upper end provided with an externalscrew-thread 21 engaging the thread 4 of the outer wall of the groove 3.The upper end of the bag 17 has a lateral flange 22 lying upon the upperextremity of the shell 19, and a gasket 23 is interposed between saidflange 22 and the top wall of the groove 3. Thus, a tight connection isprovided between the upper ends of the shell 19 and bag 17 and the cap1, yet the cap can be removed for refilling the bag.

A charging plug 24 is provided in the lower end of the shell 19 to allowinitial injection of the compressed gas 20 and to also permit rechargingwhen the gas pressure has been exhausted. This plug may contain a smallinflation valve.

It will be seen from the above that the gas 20 is entirely segregatedfrom the liquid 18. When the valve 10 is opened by depressing thepush-button 13, the gas pressure acts on the flexible bag to partiallycollapse it and this bag acts on the liquid 18 to discharge it throughthe nozzle 14.

To overcome any possibility of any portion of the bag 17 closing theinlet orifice 16 of the tube 6, a guard cage 25 has been attached at theopen end of the tube 6.

From the foregoing, it will be seen that a novel construction has beenprovided for attaining the desired ends, but attention is again invitedto the possibility of making variations within the scope of theinvention as claimed. Then, too, it is to be understood that anyappropriate materials may be employed.

I claim:

A liquid spray device comprising a head having a valve chamber, thelower side of said head having a continuous groove surrounding andspaced from said valve chamber, the outer wall of said groove having ascrew thread, a compressed-gas-containing shell having an open upperend, said open upper end having an external screw thread engaged withthe aforesaid thread, a flexible liquidcontaining bag within said shell,said bag having a continuous lateral flange lying upon the upperextremity of said shell within said groove, a gasket between said flangeand the top wall of said groove, a liquid-conducting tube within saidbag and extending to said valve chamber, a valve in said valve chamberhaving liquid discharge means terminating in a nozzle, and a push buttonoperatively connected with said valve for opening the same.

References Cited in the file of this patent UNITED STATES PATENTS566,282 Bailey Aug. 18, 1896 2,655,407 Ingel Oct. 13, 1953 2,659,516Smith Nov. 17, 1953 2,679,336 Frick May 25, 1954 2,689,768 FalligantSept. 21, 1954

